The Department of Homeland Security’s own records say they went from less than 5000 such searches in 2015 to almost 25,000 searches in 2016. In February of 2017 alone, they seized and searched 5000 devices, putting them on track to clear 50,000 searches like this by the end of 2017.

For their report, NBC interviewed 25 American citizens from across the country, both native-born and naturalized, who’d been stopped at the border and instructed to hand over their phones and passwords before proceeding. One thing they had in common? Of the 25 interviewed, 23 were Muslim.

And unless Congress acts, the practice will stay legal.

While the Fourth Amendment technically protects Americans from “unreasonable search and seizure,” the Constitution does not apply before someone is technically on American soil, even if they’ve already landed in an airport in the United States.

Senator Ron Wyden (D, OR) is leading a charge against the practice, which he says has “tremendous potential” for abuse. He’s planning to introduce a bill to require Customs and Border Protection agents to acquire a warrant before searching electronics at the border, as well as forbidding them from forcing Americans to turn over their passwords.

“This is just going to grow and grow,” he told NBC. “Law-abiding Americans are being caught up in this digital dragnet.”